EP 0097773 A1 19840111 - Lifting magnet with sensor device.
Title (en)
Lifting magnet with sensor device.
Title (de)
Hebemagnet mit Sensoreinrichtung.
Title (fr)
Aimant de levage avec dispositif de détection.
Publication
Application
Priority
DE 3212465 A 19820402
Abstract (en)
[origin: ES8404280A1] A lifting electromagnet for ferromagnetic workpieces has two composite cores which extend downwardly from a yoke. Each core has a first section which is rigid with the yoke and is surrounded by an exciting coil, a second section which is connected with the respective first section, and at least one third section which is movable with reference to the second section, either up or down or horizontally. The poles at the lower ends of the third sections make an angle of 120 degrees, the same as the poles at the lower ends of the second sections. The second sections are surrounded by induction coils, and a further induction coil is disposed between each pair of neighboring third sections. The distance between the second sections is less than the distance between the first sections, and the distance between the second sections exceeds the distance between each pair of third sections. Each pair of third sections forms part of an auxiliary magnet which is movable up and down or horizontally, depending on the nature of the workpieces which are to be lifted and transported by the electromagnet. An electromagnet with one or more horizontally movable auxiliary magnets is used for the transport of elongated workpieces, and an electromagnet with one or more vertically movable auxiliary magnets is used for the transport of large- or small-diameter workpieces.
Abstract (de)
Bei einer Transportvorrichtung mit mindestens einem Haftmagneten sind Sensoreinrichtungen in Form von Induktionsspulen (31', 34) zwischen den Schenkeln (28') bzw. umd die Schenkel (28') herum symmetrisch in Bezug auf das Zentrum des Haftmagneten angeordnet. Mit Hilfe dieser Sensoreinrichtungen (31', 34) ist es möglich die Richtung der Annäherung des Haftmagneten gegenüber einem Werkstück oder einer sonstigen ferromagnetischen Einrichtung festzustellen und die durch die Sensoreinrichtung (31', 34) feststellbare Magnetfeldänderung zu Steuerzwecken zu benutzen.
IPC 1-7
IPC 8 full level
B65G 54/00 (2006.01); B23Q 7/04 (2006.01); B25J 15/06 (2006.01); B65G 47/92 (2006.01); B66C 1/06 (2006.01); H01F 7/20 (2006.01)
CPC (source: EP US)
B23Q 7/043 (2013.01 - EP US); H01F 7/206 (2013.01 - EP US); H01F 2007/208 (2013.01 - EP US)
Citation (search report)
- DE 2554046 A1 19770616 - GOEPPINGER MAGNETFABRIK CARL S
- DE 2652188 A1 19780524 - GOEPPINGER MAGNETFABRIK CARL S
- DE 1901611 A1 19700917 - HARTUNG KUHN & CO GMBH MASCHIN
Designated contracting state (EPC)
AT CH DE FR GB IT LI
DOCDB simple family (publication)
DE 3212465 A1 19831020; AT E20457 T1 19860715; DE 3364153 D1 19860724; EP 0097773 A1 19840111; EP 0097773 B1 19860618; ES 521130 A0 19840501; ES 8404280 A1 19840501; JP S58181593 A 19831024; US 4530028 A 19850716; US 4544985 A 19851001
DOCDB simple family (application)
DE 3212465 A 19820402; AT 83103233 T 19830331; DE 3364153 T 19830331; EP 83103233 A 19830331; ES 521130 A 19830330; JP 5684883 A 19830402; US 48040183 A 19830330; US 48104683 A 19830331